关键词: 喷射沉积, Al-Cu-Mg合金, 冷轧, 退火温度, 织构, 硬度

Abstract: Effect of cold rolling reduction and subsequent solution treatment (T4) parameters on the texture evolution and hardness of spray-deposited Al-Cu-Mg alloy was tested using scanning electron microscope (SEM), X-ray diffraction(XRD), and Vickers microhardness tester. The results show that with the increase of cold rolling reduction, the initial recrystallization texture (primarily Cube{100}<001> and Goss{110}<001>) transforms significantly into a deformation texture dominated by Copper{112}<111> and Brass{110}<112> components. The texture evolution is characterized by a distinct shift along the β-fiber orientation line. Notably, the Cube{100}<001> orientation rotates directly towards the β-orientation. Following solution treatment (T4), the alloy texture undergoes significant recrystallization, predominantly reverting to a Cube{100}<001>-dominated recrystallization texture. Annealing temperature is the key factor governing both the texture components and orientation intensity (e.g., Cube texture intensity) in the T4-treated Al-Cu-Mg alloy. Regarding mechanical properties, the hardness of the cold-rolled alloy increases progressively with greater rolling reduction, with precipitation hardening by second-phase particles identifing as the primary mechanism. Conversely, the hardness of the T4-state alloy is strongly dependent on annealing temperature, exhibiting a maximum value of 135 HV10 following treatment at 390 ℃ for 2 h.

Key words: spray deposition, Al-Cu-Mg alloy, cold rolling, annealing temperature, texture, hardness